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Cobalt (III) complex diamine chloride was obtained from the reaction of Co (OAc)2, 4H2O; ethylene diamine and 3-acetyl-4-hydroxy-chromene- 2-one. The obtained product was characterized by Raman scattering, fluorescence and UV-visible spectroscopy. The room temperature structure was determined by single-crystal X-ray diffraction. The purity of the product was checked by X-ray powder diffraction analysis. Rietveld refinement using powder XRD confirms structure model determined by single-crystal X-ray diffraction (space group Pcca, a = 20.599(2) A, b = 7.888(4) A, c = 18.3820(1) A and Z = 4). The metal complex was checked for its antimicrobial activity using well diffusion method and shows significant results by comparison with commercial antibiotics. Antioxidant tests indicate that the complex is an effective DPPH radical scavenger with an IC50 value of 26.32 μM.

mediterranean journal of chemistry

Fluorescence study, Raman spectroscopy, crystal structure, antimicrobial and antioxidant activities of cobalt (III) complex with a tridentate coumarin ligand